Theater for the New City, 155 1st Ave. at 9th St., 212-254-1109: WENDY OSSERMAN DANCE CO., 30th Anniversary season. A program of new works including Imagine/non-lethal force. Thurs., May 4 at 7pm, with reception; $14, $30. Fri. - Sat., May 5-6 at 8pm; Wed. - Sat., May 10-13 at 8pm; Sun., May 7 & 14 at 3pm. $15.